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Thu, 08 Jan 2026 15:03:19 -0800 (PST) Date: Thu, 08 Jan 2026 15:03:19 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <696037b7.050a0220.1c677c.03aa.GAE@google.com> Subject: [syzbot] [mm?] WARNING in xfs_buf_alloc From: syzbot To: akpm@linux-foundation.org, apopple@nvidia.com, byungchul@sk.com, david@kernel.org, gourry@gourry.net, joshua.hahnjy@gmail.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, matthew.brost@intel.com, rakie.kim@sk.com, syzkaller-bugs@googlegroups.com, ying.huang@linux.alibaba.com, ziy@nvidia.com Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Rspamd-Queue-Id: B529F20006 X-Rspamd-Server: rspam06 X-Stat-Signature: muea66wfx6nja5y1bbuz11xfgsw9x9h6 X-Rspam-User: X-HE-Tag: 1767913400-941217 X-HE-Meta: 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 ji9yineg 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 Kwdate9W 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hello, syzbot found the following issue on: HEAD commit: 54e82e93ca93 Merge tag 'core_urgent_for_v6.19_rc4' of git:.= . git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=3D16eb4f92580000 kernel config: https://syzkaller.appspot.com/x/.config?x=3D513255d80ab78f2= b dashboard link: https://syzkaller.appspot.com/bug?extid=3D941039552756d26f5= e8e compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-= 1~exp1~20250708183702.136), Debian LLD 20.1.8 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d90= 0f083ada3/non_bootable_disk-54e82e93.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/f3befb5f53a4/vmlinux-= 54e82e93.xz kernel image: https://storage.googleapis.com/syzbot-assets/92820ca1dbd8/bzI= mage-54e82e93.xz IMPORTANT: if you fix the issue, please add the following tag to the commit= : Reported-by: syzbot+941039552756d26f5e8e@syzkaller.appspotmail.com xfs_fs_fill_super+0x11f1/0x1640 fs/xfs/xfs_super.c:1960 get_tree_bdev_flags+0x40e/0x4d0 fs/super.c:1691 vfs_get_tree+0x92/0x2a0 fs/super.c:1751 fc_mount fs/namespace.c:1199 [inline] do_new_mount_fc fs/namespace.c:3636 [inline] do_new_mount+0x302/0xa10 fs/namespace.c:3712 do_mount fs/namespace.c:4035 [inline] __do_sys_mount fs/namespace.c:4224 [inline] __se_sys_mount+0x313/0x410 fs/namespace.c:4201 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe612590f6a Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 = 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff f= f 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fe6134c1e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fe6134c1ef0 RCX: 00007fe612590f6a RDX: 0000200000009600 RSI: 0000200000009640 RDI: 00007fe6134c1eb0 RBP: 0000200000009600 R08: 00007fe6134c1ef0 R09: 0000000000200800 R10: 0000000000200800 R11: 0000000000000246 R12: 0000200000009640 R13: 00007fe6134c1eb0 R14: 0000000000009606 R15: 0000200000000000 Mem-Info: active_anon:2919 inactive_anon:35 isolated_anon:0 active_file:2500 inactive_file:35732 isolated_file:0 unevictable:1768 dirty:0 writeback:0 slab_reclaimable:7075 slab_unreclaimable:30729 mapped:9856 shmem:2274 pagetables:728 sec_pagetables:289 bounce:0 kernel_misc_reclaimable:0 free:35441 free_pcp:552 free_cma:0 Node 0 active_anon:108kB inactive_anon:68kB active_file:452kB inactive_file= :4kB unevictable:268kB isolated(anon):0kB isolated(file):0kB mapped:324kB d= irty:0kB writeback:0kB shmem:308kB shmem_thp:0kB shmem_pmdmapped:0kB anon_t= hp:0kB kernel_stack:3456kB pagetables:812kB sec_pagetables:1084kB all_unrec= laimable? no Balloon:0kB Node 1 active_anon:11568kB inactive_anon:72kB active_file:9548kB inactive_f= ile:142924kB unevictable:6804kB isolated(anon):0kB isolated(file):0kB mappe= d:39100kB dirty:0kB writeback:0kB shmem:8788kB shmem_thp:0kB shmem_pmdmappe= d:0kB anon_thp:0kB kernel_stack:7160kB pagetables:2100kB sec_pagetables:72k= B all_unreclaimable? no Balloon:0kB Node 0 DMA free:1448kB boost:0kB min:760kB low:948kB high:1136kB reserved_h= ighatomic:0KB free_highatomic:0KB active_anon:0kB inactive_anon:8kB active_= file:0kB inactive_file:0kB unevictable:268kB writepending:0kB zspages:0kB p= resent:15992kB managed:15360kB mlocked:0kB bounce:0kB free_pcp:132kB local_= pcp:132kB free_cma:0kB lowmem_reserve[]: 0 121 121 121 121 Node 0 DMA32 free:7812kB boost:0kB min:4868kB low:6084kB high:7300kB reserv= ed_highatomic:0KB free_highatomic:0KB active_anon:108kB inactive_anon:76kB = active_file:452kB inactive_file:4kB unevictable:0kB writepending:0kB zspage= s:0kB present:770052kB managed:124500kB mlocked:0kB bounce:0kB free_pcp:368= kB local_pcp:368kB free_cma:0kB lowmem_reserve[]: 0 0 0 0 0 Node 1 DMA32 free:132488kB boost:0kB min:34308kB low:42884kB high:51460kB r= eserved_highatomic:0KB free_highatomic:0KB active_anon:11592kB inactive_ano= n:80kB active_file:9552kB inactive_file:142936kB unevictable:6804kB writepe= nding:0kB zspages:1756kB present:786288kB managed:690812kB mlocked:0kB boun= ce:0kB free_pcp:1700kB local_pcp:1700kB free_cma:0kB lowmem_reserve[]: 0 0 0 0 0 Node 0 DMA: 45*4kB (U) 31*8kB (U) 4*16kB (U) 8*32kB (U) 5*64kB (U) 1*128kB = (U) 1*256kB (U) 0*512kB 0*1024kB 0*2048kB 0*4096kB =3D 1452kB Node 0 DMA32: 19*4kB (UME) 17*8kB (UME) 31*16kB (UM) 44*32kB (UME) 21*64kB = (UME) 16*128kB (UM) 7*256kB (ME) 1*512kB (U) 0*1024kB 0*2048kB 0*4096kB =3D= 7812kB Node 1 DMA32: 2278*4kB (UE) 566*8kB (U) 68*16kB (UM) 270*32kB (UME) 239*64k= B (UME) 57*128kB (UE) 16*256kB (UM) 1*512kB (U) 2*1024kB (U) 3*2048kB (UM) = 18*4096kB (M) =3D 132488kB Node 0 hugepages_total=3D0 hugepages_free=3D0 hugepages_surp=3D0 hugepages_= size=3D1048576kB Node 0 hugepages_total=3D2 hugepages_free=3D2 hugepages_surp=3D0 hugepages_= size=3D2048kB Node 1 hugepages_total=3D0 hugepages_free=3D0 hugepages_surp=3D0 hugepages_= size=3D1048576kB Node 1 hugepages_total=3D2 hugepages_free=3D2 hugepages_surp=3D0 hugepages_= size=3D2048kB 40623 total pagecache pages 83 pages in swap cache Free swap =3D 106924kB Total swap =3D 124996kB 393083 pages RAM 0 pages HighMem/MovableOnly 185415 pages reserved 0 pages cma reserved XFS (loop0): Ending clean mount ------------[ cut here ]------------ WARNING: mm/page_alloc.c:4692 at __alloc_pages_slowpath+0xcad/0xce0 mm/page= _alloc.c:4692, CPU#0: syz.0.0/5345 Modules linked in: CPU: 0 UID: 0 PID: 5345 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full= )=20 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16= .3-2~bpo12+1 04/01/2014 RIP: 0010:__alloc_pages_slowpath+0xcad/0xce0 mm/page_alloc.c:4692 Code: 48 8b 1c 25 08 c0 80 92 48 83 c3 2c 48 89 d8 48 c1 e8 03 0f b6 04 08 = 84 c0 75 22 f6 43 01 08 48 8b 14 24 0f 84 9d f3 ff ff 90 <0f> 0b 90 e9 94 f= 3 ff ff e8 96 69 40 09 90 0f 0b 90 eb c2 89 d9 80 RSP: 0018:ffffc9000d6e5c90 EFLAGS: 00010202 RAX: 0000000000000000 RBX: ffff88800025002c RCX: dffffc0000000000 RDX: ffffc9000d6e5da0 RSI: 0000000000000000 RDI: 0000000001048c50 RBP: 0000000001048c50 R08: ffff88802fffd9b0 R09: 1ffff1100365ea01 R10: dffffc0000000000 R11: ffffed100365ea02 R12: ffffc9000d6e5da0 R13: 1ffff92001adcbb0 R14: 0000000000000000 R15: dffffc0000000000 FS: 00007fe6134c26c0(0000) GS:ffff88808d414000(0000) knlGS:000000000000000= 0 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6d79d29120 CR3: 0000000035b0b000 CR4: 0000000000352ef0 Call Trace: __alloc_frozen_pages_noprof+0x319/0x370 mm/page_alloc.c:5223 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2486 alloc_slab_page mm/slub.c:3075 [inline] allocate_slab+0x134/0x3b0 mm/slub.c:3256 new_slab mm/slub.c:3302 [inline] ___slab_alloc+0xe53/0x1820 mm/slub.c:4656 __slab_alloc+0x65/0x100 mm/slub.c:4779 __slab_alloc_node mm/slub.c:4855 [inline] slab_alloc_node mm/slub.c:5251 [inline] kmem_cache_alloc_noprof+0x40f/0x710 mm/slub.c:5270 xfs_buf_alloc+0x60/0x1ca0 fs/xfs/xfs_buf.c:265 xfs_buf_find_insert+0x52/0x1410 fs/xfs/xfs_buf.c:502 xfs_buf_get_map+0x1225/0x17a0 fs/xfs/xfs_buf.c:606 xfs_buf_read_map+0x82/0xa30 fs/xfs/xfs_buf.c:699 xfs_trans_read_buf_map+0x1d7/0x8a0 fs/xfs/xfs_trans_buf.c:304 xfs_trans_read_buf fs/xfs/xfs_trans.h:210 [inline] xfs_imap_to_bp+0x127/0x2f0 fs/xfs/libxfs/xfs_inode_buf.c:139 xfs_inode_item_precommit+0x729/0xb40 fs/xfs/xfs_inode_item.c:170 xfs_trans_run_precommits fs/xfs/xfs_trans.c:800 [inline] __xfs_trans_commit+0x2e1/0xbe0 fs/xfs/xfs_trans.c:843 xfs_trans_commit+0x13e/0x1c0 fs/xfs/xfs_trans.c:928 xfs_fs_dirty_inode+0x18e/0x1e0 fs/xfs/xfs_super.c:740 __mark_inode_dirty+0x390/0x1330 fs/fs-writeback.c:2587 mark_inode_dirty_sync include/linux/fs.h:2200 [inline] iput+0x3e8/0x1030 fs/inode.c:1984 __dentry_kill+0x209/0x660 fs/dcache.c:670 shrink_kill+0xa9/0x2c0 fs/dcache.c:1137 shrink_dentry_list+0x2e0/0x5e0 fs/dcache.c:1164 prune_dcache_sb+0x10e/0x180 fs/dcache.c:1246 super_cache_scan+0x369/0x4b0 fs/super.c:222 do_shrink_slab+0x6df/0x10d0 mm/shrinker.c:437 shrink_slab_memcg mm/shrinker.c:550 [inline] shrink_slab+0x7ef/0x10d0 mm/shrinker.c:628 shrink_one+0x2d9/0x720 mm/vmscan.c:4921 shrink_many mm/vmscan.c:4982 [inline] lru_gen_shrink_node mm/vmscan.c:5060 [inline] shrink_node+0x2f7d/0x35b0 mm/vmscan.c:6047 shrink_zones mm/vmscan.c:6300 [inline] do_try_to_free_pages+0x668/0x1960 mm/vmscan.c:6362 try_to_free_pages+0x892/0xd90 mm/vmscan.c:6608 __perform_reclaim mm/page_alloc.c:4377 [inline] __alloc_pages_direct_reclaim+0x144/0x300 mm/page_alloc.c:4399 __alloc_pages_slowpath+0x60c/0xce0 mm/page_alloc.c:4843 __alloc_frozen_pages_noprof+0x319/0x370 mm/page_alloc.c:5223 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2486 alloc_frozen_pages_noprof mm/mempolicy.c:2557 [inline] alloc_pages_noprof+0xa9/0x190 mm/mempolicy.c:2577 vm_area_alloc_pages mm/vmalloc.c:3718 [inline] __vmalloc_area_node mm/vmalloc.c:3863 [inline] __vmalloc_node_range_noprof+0xc18/0x16a0 mm/vmalloc.c:4051 __vmalloc_node_noprof mm/vmalloc.c:4111 [inline] vzalloc_noprof+0xb2/0xf0 mm/vmalloc.c:4189 alloc_one_pg_vec_page net/packet/af_packet.c:4372 [inline] alloc_pg_vec net/packet/af_packet.c:4397 [inline] packet_set_ring+0x6f3/0x2120 net/packet/af_packet.c:4482 packet_setsockopt+0xc5a/0x12c0 net/packet/af_packet.c:3838 do_sock_setsockopt+0x25a/0x3e0 net/socket.c:2322 __sys_setsockopt net/socket.c:2347 [inline] __do_sys_setsockopt net/socket.c:2353 [inline] __se_sys_setsockopt net/socket.c:2350 [inline] __x64_sys_setsockopt+0x18b/0x220 net/socket.c:2350 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe61258f7c9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 = 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff f= f 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fe6134c2038 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007fe6127e5fa0 RCX: 00007fe61258f7c9 RDX: 000000000000000d RSI: 0000000000000107 RDI: 0000000000000009 RBP: 00007fe612613f91 R08: 000000000000001c R09: 0000000000000000 R10: 0000200000000040 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fe6127e6038 R14: 00007fe6127e5fa0 R15: 00007ffe60227bc8 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup