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bug-guix <at> gnu.org:bug#79800; Package guix.
(Sun, 09 Nov 2025 14:38:02 GMT) Full text and rfc822 format available.Tomas Volf <~@wolfsden.cz>:bug-guix <at> gnu.org.
(Sun, 09 Nov 2025 14:38:02 GMT) Full text and rfc822 format available.Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):
From: Tomas Volf <~@wolfsden.cz> To: bug-guix <at> gnu.org Subject: prepare_slab_obj_exts_hook, maple_node: Failed to create slab extension vector! Date: Sun, 09 Nov 2025 15:37:07 +0100
Hello, I keep hitting a bug leading to a null pointer dereference. The kernel bug-report page says that bugs should be reported to the distribution, so here I am. There are no reproduction steps. Some days I just wake up and see the output in the terminal. Using the system is no longer possible and reboot using REISUB is required. It would seem that c7af5300d78460fc5037ddc77113ba3dbfe77dc0 and f3886f075c1fe83f29b011a69a197099c6bb814c were supposed to fix this, but I am already running 6.12.56, and the problem did still happen. I do not see anything relevant in change log for .57. Final note, I am using non-libre kernel, but I think that should not really matter here, since this is memory management. dmesg output: --8<---------------cut here---------------start------------->8--- Nov 9 09:08:33 xxx vmunix: [251177.436159] ------------[ cut here ]------------ Nov 9 09:08:33 xxx vmunix: [251177.436498] prepare_slab_obj_exts_hook, maple_node: Failed to create slab extension vector! Nov 9 09:08:33 xxx vmunix: [251177.436729] WARNING: CPU: 22 PID: 1771 at mm/slub.c:2108 alloc_tagging_slab_alloc_hook+0x1e8/0x230 Nov 9 09:08:33 xxx vmunix: [251177.436947] Modules linked in: cts rpcsec_gss_krb5 wireguard curve25519_x86_64 libchacha20poly1305 chacha_x86_64 poly1305_x86_64 libcurve25519_generic libchacha ip6_udp_tunnel udp_tunnel binfmt_misc amdgpu amd_atl intel_rapl_msr intel_rapl_common edac_mce_amd amdxcp drm_exec kvm_amd snd_hda_codec_realtek gpu_sched snd_hda_codec_hdmi drm_buddy snd_hda_codec_generic drm_suballoc_helper drm_ttm_helper snd_hda_scodec_component kvm ttm drm_display_helper eeepc_wmi irqbypass snd_hda_intel asus_wmi crct10dif_pclmul cec snd_intel_dspcfg crc32_pclmul spd5118 platform_profile polyval_clmulni snd_intel_sdw_acpi rc_core polyval_generic battery sparse_keymap ghash_clmulni_intel snd_hda_codec drm_kms_helper sha512_ssse3 wmi_bmof sha256_ssse3 sp5100_tco snd_hda_core sha1_ssse3 drm aesni_intel snd_hwdep crypto_simd snd_pcm cryptd i2c_algo_bit snd_timer snd i2c_piix4 soundcore i2c_smbus pcspkr k10temp ccp efi_pstore r8169 realtek video gpio_amdpt gpio_generic wmi mac_hid nft_reject_inet nf_reject_ipv4 nf_reject_ip Nov 9 09:08:33 xxx vmunix: 6 nf Nov 9 09:08:33 xxx vmunix: t_reject nft_ct Nov 9 09:08:33 xxx vmunix: [251177.437012] nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nf_tables nfnetlink nfsd auth_rpcgss nfs_acl lockd grace nfs_localio sunrpc btrfs libcrc32c raid6_pq xor virtio_rng virtio_console virtio_net virtio_blk virtio_balloon virtio_pci virtio_pci_legacy_dev virtio_pci_modern_dev virtio_ring virtio isci libsas scsi_transport_sas pata_atiixp pata_acpi nls_iso8859_1 wp512 serpent_generic xts dm_crypt mmc_block rpmb_core hid_apple hid_generic usbhid hid uas usb_storage ahci libahci Nov 9 09:08:33 xxx vmunix: [251177.439045] CPU: 22 UID: 0 PID: 1771 Comm: btrfs-transacti Not tainted 6.12.56 #1 7b2daa82109b71470fdde24995098e6f75931a33 Nov 9 09:08:33 xxx vmunix: [251177.439047] Hardware name: ASUS System Product Name/TUF GAMING X670E-PLUS, BIOS 3278 07/15/2025 Nov 9 09:08:33 xxx vmunix: [251177.439049] RIP: 0010:alloc_tagging_slab_alloc_hook+0x1e8/0x230 Nov 9 09:08:33 xxx vmunix: [251177.439051] Code: 89 e6 4c 89 ef e8 d8 e9 ff ff 85 c0 0f 84 c3 fe ff ff 49 8b 54 24 60 48 c7 c6 90 8e 44 a2 48 c7 c7 50 df a1 a2 e8 f8 75 cd ff <0f> 0b e9 56 ff ff ff 48 8b 0d da 49 e4 01 e9 58 fe ff ff 4c 8d 69 Nov 9 09:08:33 xxx vmunix: [251177.439052] RSP: 0018:ffff9f1f417df730 EFLAGS: 00010246 Nov 9 09:08:33 xxx vmunix: [251177.440158] RAX: 0000000000000000 RBX: ffff8f88632d9800 RCX: 0000000000000000 Nov 9 09:08:33 xxx vmunix: [251177.440159] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 Nov 9 09:08:33 xxx vmunix: [251177.440160] RBP: ffff9f1f417df750 R08: 0000000000000000 R09: 0000000000000000 Nov 9 09:08:33 xxx vmunix: [251177.440161] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8f8940045b00 Nov 9 09:08:33 xxx vmunix: [251177.441632] R13: ffffccdf008cb600 R14: ffffffffa1724c10 R15: 0000000000000100 Nov 9 09:08:33 xxx vmunix: [251177.441634] FS: 0000000000000000(0000) GS:ffff8fa81e100000(0000) knlGS:0000000000000000 Nov 9 09:08:33 xxx vmunix: [251177.441635] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Nov 9 09:08:33 xxx vmunix: [251177.441636] CR2: 00007f32fda00000 CR3: 0000001f33236000 CR4: 0000000000750ef0 Nov 9 09:08:33 xxx vmunix: [251177.441637] PKRU: 55555554 Nov 9 09:08:33 xxx vmunix: [251177.443126] Call Trace: Nov 9 09:08:33 xxx vmunix: [251177.443128] <TASK> Nov 9 09:08:33 xxx vmunix: [251177.443130] ? bvec_alloc+0x80/0x170 Nov 9 09:08:33 xxx vmunix: [251177.444139] kmem_cache_alloc_noprof+0x110/0x310 Nov 9 09:08:33 xxx vmunix: [251177.444141] ? srso_alias_return_thunk+0x5/0xfbef5 Nov 9 09:08:33 xxx vmunix: [251177.444747] bvec_alloc+0x80/0x170 Nov 9 09:08:33 xxx vmunix: [251177.444749] bio_alloc_bioset+0x32b/0x620 Nov 9 09:08:33 xxx vmunix: [251177.444751] ? __pfx_end_bbio_meta_write+0x10/0x10 [btrfs 76d5f5c52907bf310127e1cc4109fbd1dd6b578f] Nov 9 09:08:33 xxx vmunix: [251177.445654] btrfs_bio_alloc+0x37/0x70 [btrfs 76d5f5c52907bf310127e1cc4109fbd1dd6b578f] Nov 9 09:08:33 xxx vmunix: [251177.445982] write_one_eb+0xdd/0x380 [btrfs 76d5f5c52907bf310127e1cc4109fbd1dd6b578f] Nov 9 09:08:33 xxx vmunix: [251177.446004] ? srso_alias_return_thunk+0x5/0xfbef5 Nov 9 09:08:33 xxx vmunix: [251177.446005] btree_write_cache_pages+0x5c0/0x6b0 [btrfs 76d5f5c52907bf310127e1cc4109fbd1dd6b578f] Nov 9 09:08:33 xxx vmunix: [251177.446025] ? srso_alias_return_thunk+0x5/0xfbef5 Nov 9 09:08:33 xxx vmunix: [251177.446029] ? srso_alias_return_thunk+0x5/0xfbef5 Nov 9 09:08:33 xxx vmunix: [251177.446030] ? asm_sysvec_call_function_single+0x1f/0x30 Nov 9 09:08:33 xxx vmunix: [251177.446032] btree_writepages+0x6b/0x80 [btrfs 76d5f5c52907bf310127e1cc4109fbd1dd6b578f] Nov 9 09:08:33 xxx vmunix: [251177.448169] do_writepages+0xe2/0x260 Nov 9 09:08:33 xxx vmunix: [251177.448172] ? asm_sysvec_call_function_single+0x1f/0x30 Nov 9 09:08:33 xxx vmunix: [251177.448175] filemap_fdatawrite_wbc+0x72/0xa0 Nov 9 09:08:33 xxx vmunix: [251177.449334] __filemap_fdatawrite_range+0x71/0xa0 Nov 9 09:08:33 xxx vmunix: [251177.449341] filemap_fdatawrite_range+0x17/0x30 Nov 9 09:08:33 xxx vmunix: [251177.450042] btrfs_write_marked_extents+0x60/0x150 [btrfs 76d5f5c52907bf310127e1cc4109fbd1dd6b578f] Nov 9 09:08:33 xxx vmunix: [251177.450377] btrfs_write_and_wait_transaction+0x4f/0xd0 [btrfs 76d5f5c52907bf310127e1cc4109fbd1dd6b578f] Nov 9 09:08:33 xxx vmunix: [251177.450706] ? srso_alias_return_thunk+0x5/0xfbef5 Nov 9 09:08:33 xxx vmunix: [251177.450709] btrfs_commit_transaction+0x62c/0xba0 [btrfs 76d5f5c52907bf310127e1cc4109fbd1dd6b578f] Nov 9 09:08:33 xxx vmunix: [251177.451353] transaction_kthread+0x16b/0x1e0 [btrfs 76d5f5c52907bf310127e1cc4109fbd1dd6b578f] Nov 9 09:08:33 xxx vmunix: [251177.451372] ? __pfx_transaction_kthread+0x10/0x10 [btrfs 76d5f5c52907bf310127e1cc4109fbd1dd6b578f] Nov 9 09:08:33 xxx vmunix: [251177.451389] kthread+0xe5/0x120 Nov 9 09:08:33 xxx vmunix: [251177.451391] ? __pfx_kthread+0x10/0x10 Nov 9 09:08:33 xxx vmunix: [251177.451393] ret_from_fork+0x48/0x70 Nov 9 09:08:33 xxx vmunix: [251177.451395] ? __pfx_kthread+0x10/0x10 Nov 9 09:08:33 xxx vmunix: [251177.451397] ret_from_fork_asm+0x1a/0x30 Nov 9 09:08:33 xxx vmunix: [251177.453592] </TASK> Nov 9 09:08:33 xxx vmunix: [251177.453593] ---[ end trace 0000000000000000 ]--- Nov 9 09:08:33 xxx vmunix: [251177.454889] BUG: kernel NULL pointer dereference, address: 0000000000000005 Nov 9 09:08:33 xxx vmunix: [251177.454890] #PF: supervisor read access in kernel mode Nov 9 09:08:33 xxx vmunix: [251177.455511] #PF: error_code(0x0000) - not-present page Nov 9 09:08:33 xxx vmunix: [251177.455512] PGD 0 P4D 0 Nov 9 09:08:33 xxx vmunix: [251177.455513] Oops: Oops: 0000 [#1] PREEMPT SMP NOPTI Nov 9 09:08:33 xxx vmunix: [251177.455515] CPU: 22 UID: 0 PID: 1771 Comm: btrfs-transacti Tainted: G W 6.12.56 #1 7b2daa82109b71470fdde24995098e6f75931a33 Nov 9 09:08:33 xxx vmunix: [251177.455518] Tainted: [W]=WARN Nov 9 09:08:33 xxx vmunix: [251177.455518] Hardware name: ASUS System Product Name/TUF GAMING X670E-PLUS, BIOS 3278 07/15/2025 Nov 9 09:08:33 xxx vmunix: [251177.455519] RIP: 0010:alloc_tagging_slab_alloc_hook+0x204/0x230 Nov 9 09:08:33 xxx vmunix: [251177.455521] Code: 44 a2 48 c7 c7 50 df a1 a2 e8 f8 75 cd ff 0f 0b e9 56 ff ff ff 48 8b 0d da 49 e4 01 e9 58 fe ff ff 4c 8d 69 ff e9 76 fe ff ff <8b> 50 04 48 8b 70 18 48 c7 c7 d8 b9 a1 a2 c6 05 fd 95 08 02 01 e8 Nov 9 09:08:33 xxx vmunix: [251177.455522] RSP: 0018:ffff9f1f417df730 EFLAGS: 00010246 Nov 9 09:08:33 xxx vmunix: [251177.455523] RAX: 0000000000000001 RBX: ffffffffa34d9648 RCX: 0000000000000007 Nov 9 09:08:33 xxx vmunix: [251177.455524] RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000000000 Nov 9 09:08:33 xxx vmunix: [251177.455525] RBP: ffff9f1f417df750 R08: 0000000000000000 R09: 0000000000000000 Nov 9 09:08:33 xxx vmunix: [251177.455526] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000100 Nov 9 09:08:33 xxx vmunix: [251177.455526] R13: ffff8f88632d8000 R14: ffff8f9acde331e0 R15: 0000000000000100 Nov 9 09:08:33 xxx vmunix: [251177.455527] FS: 0000000000000000(0000) GS:ffff8fa81e100000(0000) knlGS:0000000000000000 Nov 9 09:08:33 xxx vmunix: [251177.455528] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Nov 9 09:08:33 xxx vmunix: [251177.455529] CR2: 0000000000000005 CR3: 0000001f33236000 CR4: 0000000000750ef0 Nov 9 09:08:33 xxx vmunix: [251177.455530] PKRU: 55555554 Nov 9 09:08:33 xxx vmunix: [251177.455530] Call Trace: Nov 9 09:08:33 xxx vmunix: [251177.455531] <TASK> Nov 9 09:08:33 xxx vmunix: [251177.455532] ? bvec_alloc+0x80/0x170 Nov 9 09:08:33 xxx vmunix: [251177.455533] kmem_cache_alloc_noprof+0x110/0x310 Nov 9 09:08:33 xxx vmunix: [251177.455535] ? srso_alias_return_thunk+0x5/0xfbef5 Nov 9 09:08:33 xxx vmunix: [251177.455537] bvec_alloc+0x80/0x170 Nov 9 09:08:33 xxx vmunix: [251177.455539] bio_alloc_bioset+0x32b/0x620 Nov 9 09:08:33 xxx vmunix: [251177.455541] ? __pfx_end_bbio_meta_write+0x10/0x10 [btrfs 76d5f5c52907bf310127e1cc4109fbd1dd6b578f] Nov 9 09:08:33 xxx vmunix: [251177.455568] btrfs_bio_alloc+0x37/0x70 [btrfs 76d5f5c52907bf310127e1cc4109fbd1dd6b578f] Nov 9 09:08:33 xxx vmunix: [251177.462968] write_one_eb+0xdd/0x380 [btrfs 76d5f5c52907bf310127e1cc4109fbd1dd6b578f] Nov 9 09:08:33 xxx vmunix: [251177.463228] ? srso_alias_return_thunk+0x5/0xfbef5 Nov 9 09:08:33 xxx vmunix: [251177.463230] btree_write_cache_pages+0x5c0/0x6b0 [btrfs 76d5f5c52907bf310127e1cc4109fbd1dd6b578f] Nov 9 09:08:33 xxx vmunix: [251177.463730] ? srso_alias_return_thunk+0x5/0xfbef5 Nov 9 09:08:33 xxx vmunix: [251177.463735] ? srso_alias_return_thunk+0x5/0xfbef5 Nov 9 09:08:33 xxx vmunix: [251177.464219] ? asm_sysvec_call_function_single+0x1f/0x30 Nov 9 09:08:33 xxx vmunix: [251177.464222] btree_writepages+0x6b/0x80 [btrfs 76d5f5c52907bf310127e1cc4109fbd1dd6b578f] Nov 9 09:08:33 xxx vmunix: [251177.464712] do_writepages+0xe2/0x260 Nov 9 09:08:33 xxx vmunix: [251177.464714] ? asm_sysvec_call_function_single+0x1f/0x30 Nov 9 09:08:33 xxx vmunix: [251177.465206] filemap_fdatawrite_wbc+0x72/0xa0 Nov 9 09:08:33 xxx vmunix: [251177.465450] __filemap_fdatawrite_range+0x71/0xa0 Nov 9 09:08:33 xxx vmunix: [251177.465457] filemap_fdatawrite_range+0x17/0x30 Nov 9 09:08:33 xxx vmunix: [251177.465945] btrfs_write_marked_extents+0x60/0x150 [btrfs 76d5f5c52907bf310127e1cc4109fbd1dd6b578f] Nov 9 09:08:33 xxx vmunix: [251177.466208] btrfs_write_and_wait_transaction+0x4f/0xd0 [btrfs 76d5f5c52907bf310127e1cc4109fbd1dd6b578f] Nov 9 09:08:33 xxx vmunix: [251177.466226] ? srso_alias_return_thunk+0x5/0xfbef5 Nov 9 09:08:33 xxx vmunix: [251177.466715] btrfs_commit_transaction+0x62c/0xba0 [btrfs 76d5f5c52907bf310127e1cc4109fbd1dd6b578f] Nov 9 09:08:33 xxx vmunix: [251177.466734] transaction_kthread+0x16b/0x1e0 [btrfs 76d5f5c52907bf310127e1cc4109fbd1dd6b578f] Nov 9 09:08:33 xxx vmunix: [251177.467229] ? __pfx_transaction_kthread+0x10/0x10 [btrfs 76d5f5c52907bf310127e1cc4109fbd1dd6b578f] Nov 9 09:08:33 xxx vmunix: [251177.467246] kthread+0xe5/0x120 Nov 9 09:08:33 xxx vmunix: [251177.467248] ? __pfx_kthread+0x10/0x10 Nov 9 09:08:33 xxx vmunix: [251177.467250] ret_from_fork+0x48/0x70 Nov 9 09:08:33 xxx vmunix: [251177.467251] ? __pfx_kthread+0x10/0x10 Nov 9 09:08:33 xxx vmunix: [251177.467253] ret_from_fork_asm+0x1a/0x30 Nov 9 09:08:33 xxx vmunix: [251177.467256] </TASK> Nov 9 09:08:33 xxx vmunix: [251177.467256] Modules linked in: cts rpcsec_gss_krb5 wireguard curve25519_x86_64 libchacha20poly1305 chacha_x86_64 poly1305_x86_64 libcurve25519_generic libchacha ip6_udp_tunnel udp_tunnel binfmt_misc amdgpu amd_atl intel_rapl_msr intel_rapl_common edac_mce_amd amdxcp drm_exec kvm_amd snd_hda_codec_realtek gpu_sched snd_hda_codec_hdmi drm_buddy snd_hda_codec_generic drm_suballoc_helper drm_ttm_helper snd_hda_scodec_component kvm ttm drm_display_helper eeepc_wmi irqbypass snd_hda_intel asus_wmi crct10dif_pclmul cec snd_intel_dspcfg crc32_pclmul spd5118 platform_profile polyval_clmulni snd_intel_sdw_acpi rc_core polyval_generic battery sparse_keymap ghash_clmulni_intel snd_hda_codec drm_kms_helper sha512_ssse3 wmi_bmof sha256_ssse3 sp5100_tco snd_hda_core sha1_ssse3 drm aesni_intel snd_hwdep crypto_simd snd_pcm cryptd i2c_algo_bit snd_timer snd i2c_piix4 soundcore i2c_smbus pcspkr k10temp ccp efi_pstore r8169 realtek video gpio_amdpt gpio_generic wmi mac_hid nft_reject_inet nf_reject_ipv4 nf_reject_ip Nov 9 09:08:33 xxx vmunix: 6 nf Nov 9 09:08:33 xxx vmunix: t_reject nft_ct Nov 9 09:08:33 xxx vmunix: [251177.467298] nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nf_tables nfnetlink nfsd auth_rpcgss nfs_acl lockd grace nfs_localio sunrpc btrfs libcrc32c raid6_pq xor virtio_rng virtio_console virtio_net virtio_blk virtio_balloon virtio_pci virtio_pci_legacy_dev virtio_pci_modern_dev virtio_ring virtio isci libsas scsi_transport_sas pata_atiixp pata_acpi nls_iso8859_1 wp512 serpent_generic xts dm_crypt mmc_block rpmb_core hid_apple hid_generic usbhid hid uas usb_storage ahci libahci Nov 9 09:08:33 xxx vmunix: [251177.467321] CR2: 0000000000000005 Nov 9 09:08:33 xxx vmunix: [251177.467323] ---[ end trace 0000000000000000 ]--- Nov 9 09:08:33 xxx vmunix: [251177.467323] RIP: 0010:alloc_tagging_slab_alloc_hook+0x204/0x230 Nov 9 09:08:33 xxx vmunix: [251177.467325] Code: 44 a2 48 c7 c7 50 df a1 a2 e8 f8 75 cd ff 0f 0b e9 56 ff ff ff 48 8b 0d da 49 e4 01 e9 58 fe ff ff 4c 8d 69 ff e9 76 fe ff ff <8b> 50 04 48 8b 70 18 48 c7 c7 d8 b9 a1 a2 c6 05 fd 95 08 02 01 e8 Nov 9 09:08:33 xxx vmunix: [251177.467326] RSP: 0018:ffff9f1f417df730 EFLAGS: 00010246 Nov 9 09:08:33 xxx vmunix: [251177.467327] RAX: 0000000000000001 RBX: ffffffffa34d9648 RCX: 0000000000000007 Nov 9 09:08:33 xxx vmunix: [251177.467328] RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000000000 Nov 9 09:08:33 xxx vmunix: [251177.467328] RBP: ffff9f1f417df750 R08: 0000000000000000 R09: 0000000000000000 Nov 9 09:08:33 xxx vmunix: [251177.467329] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000100 Nov 9 09:08:33 xxx vmunix: [251177.467329] R13: ffff8f88632d8000 R14: ffff8f9acde331e0 R15: 0000000000000100 Nov 9 09:08:33 xxx vmunix: [251177.467330] FS: 0000000000000000(0000) GS:ffff8fa81e100000(0000) knlGS:0000000000000000 Nov 9 09:08:33 xxx vmunix: [251177.467331] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Nov 9 09:08:33 xxx vmunix: [251177.467332] CR2: 0000000000000005 CR3: 0000001f33236000 CR4: 0000000000750ef0 Nov 9 09:08:33 xxx vmunix: [251177.467333] PKRU: 55555554 Nov 9 09:08:33 xxx vmunix: [251177.467333] note: btrfs-transacti[1771] exited with irqs disabled --8<---------------cut here---------------end--------------->8--- -- There are only two hard things in Computer Science: cache invalidation, naming things and off-by-one errors.
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