ci2 starts bisection 2026-08-28 10:41:26.097335348 +0000 UTC m=+9089.106134956 bisecting fixing commit since c85054db46181ee85f10be997f41b347c85bd89b building syzkaller on fb92f11c4789d9647a75c09c983dbee5c8488ccf ensuring issue is reproducible on original commit c85054db46181ee85f10be997f41b347c85bd89b testing commit c85054db46181ee85f10be997f41b347c85bd89b gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: e1c6c658f1a232d34ca23a12eb650394a26a7598c4bb7651031520e3bd6d7f0c run #0: crashed: KASAN: use-after-free Read in link_path_walk run #1: crashed: KASAN: use-after-free Read in atime_needs_update run #2: crashed: KASAN: use-after-free Read in step_into run #3: crashed: KASAN: use-after-free Read in step_into run #4: crashed: KASAN: use-after-free Read in link_path_walk run #5: crashed: KASAN: use-after-free Read in link_path_walk run #6: crashed: KASAN: use-after-free Read in atime_needs_update run #7: crashed: KASAN: use-after-free Read in timestamp_truncate run #8: crashed: KASAN: use-after-free Read in atime_needs_update run #9: crashed: KASAN: use-after-free Read in step_into run #10: crashed: KASAN: use-after-free Read in atime_needs_update run #11: crashed: KASAN: use-after-free Read in link_path_walk run #12: crashed: KASAN: use-after-free Read in link_path_walk run #13: crashed: KASAN: use-after-free Read in atime_needs_update run #14: crashed: KASAN: use-after-free Read in link_path_walk run #15: crashed: KASAN: use-after-free Read in link_path_walk run #16: crashed: KASAN: use-after-free Read in link_path_walk run #17: crashed: KASAN: use-after-free Read in __inode_security_revalidate run #18: crashed: KASAN: use-after-free Read in atime_needs_update run #19: crashed: KASAN: use-after-free Read in atime_needs_update representative crash: KASAN: use-after-free Read in link_path_walk, types: [KASAN-USE-AFTER-FREE-READ] check whether we can drop unnecessary instrumentation disabling configs for [ubsan bug_or_warning locking atomic_sleep hang memleak], they are not needed testing commit c85054db46181ee85f10be997f41b347c85bd89b gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 3c0d827a59d821044bfbe58145b0414e5ba92b44b1bfa832838e81c3fb94f77d run #0: crashed: KASAN: use-after-free Read in current_time run #1: crashed: KASAN: use-after-free Read in step_into run #2: crashed: KASAN: use-after-free Read in link_path_walk run #3: crashed: KASAN: use-after-free Read in link_path_walk run #4: crashed: KASAN: use-after-free Read in link_path_walk run #5: crashed: KASAN: use-after-free Read in link_path_walk run #6: crashed: KASAN: use-after-free Read in link_path_walk run #7: crashed: KASAN: use-after-free Read in current_time run #8: crashed: KASAN: use-after-free Read in link_path_walk run #9: crashed: KASAN: use-after-free Read in step_into representative crash: KASAN: use-after-free Read in current_time, types: [KASAN-USE-AFTER-FREE-READ] the bug reproduces without the instrumentation disabling configs for [locking atomic_sleep hang memleak ubsan bug_or_warning], they are not needed kconfig minimization: base=4921 full=6218 leaves diff=256 split chunks (needed=false): <256> split chunk #0 of len 256 into 5 parts testing without sub-chunk 1/5 disabling configs for [bug_or_warning locking atomic_sleep hang memleak ubsan], they are not needed testing commit c85054db46181ee85f10be997f41b347c85bd89b gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: eb97d3300f58c246bf637dd8e76a5ae883425a21b29110e8836bdc9cfe700090 run #0: crashed: KASAN: use-after-free Read in link_path_walk run #1: crashed: KASAN: use-after-free Read in link_path_walk run #2: crashed: KASAN: use-after-free Read in selinux_inode_follow_link run #3: crashed: KASAN: use-after-free Read in link_path_walk run #4: crashed: KASAN: use-after-free Read in atime_needs_update run #5: crashed: KASAN: use-after-free Read in link_path_walk run #6: crashed: KASAN: use-after-free Read in atime_needs_update run #7: crashed: KASAN: use-after-free Read in link_path_walk run #8: crashed: KASAN: use-after-free Read in link_path_walk run #9: crashed: KASAN: use-after-free Read in link_path_walk representative crash: KASAN: use-after-free Read in link_path_walk, types: [KASAN-USE-AFTER-FREE-READ] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [bug_or_warning locking atomic_sleep hang memleak ubsan], they are not needed testing commit c85054db46181ee85f10be997f41b347c85bd89b gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 885fd37360db4a94b65ca7a5f4331c7368e42504416151e1b6b32ec1a95945f0 run #0: crashed: KASAN: use-after-free Read in link_path_walk run #1: crashed: KASAN: use-after-free Read in link_path_walk run #2: crashed: KASAN: use-after-free Read in current_time run #3: crashed: KASAN: use-after-free Read in current_time run #4: crashed: KASAN: use-after-free Read in atime_needs_update run #5: crashed: KASAN: use-after-free Read in step_into run #6: crashed: KASAN: use-after-free Read in __inode_security_revalidate run #7: crashed: KASAN: use-after-free Read in atime_needs_update run #8: crashed: KASAN: use-after-free Read in __inode_security_revalidate run #9: crashed: KASAN: use-after-free Read in security_inode_follow_link representative crash: KASAN: use-after-free Read in link_path_walk, types: [KASAN-USE-AFTER-FREE-READ] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [hang memleak ubsan bug_or_warning locking atomic_sleep], they are not needed testing commit c85054db46181ee85f10be997f41b347c85bd89b gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 6dd3bbaa8149e30ddfff6099ead300183ee72ce35d7637e218b8ff4e57688f1f run #0: crashed: KASAN: use-after-free Read in selinux_inode_follow_link run #1: crashed: KASAN: use-after-free Read in link_path_walk run #2: crashed: KASAN: use-after-free Read in link_path_walk run #3: crashed: KASAN: use-after-free Read in atime_needs_update run #4: crashed: KASAN: use-after-free Read in link_path_walk run #5: crashed: KASAN: use-after-free Read in link_path_walk run #6: crashed: KASAN: use-after-free Read in step_into run #7: crashed: KASAN: use-after-free Read in step_into run #8: crashed: KASAN: use-after-free Read in link_path_walk run #9: crashed: KASAN: use-after-free Read in __inode_security_revalidate representative crash: KASAN: use-after-free Read in selinux_inode_follow_link, types: [KASAN-USE-AFTER-FREE-READ] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [ubsan bug_or_warning locking atomic_sleep hang memleak], they are not needed testing commit c85054db46181ee85f10be997f41b347c85bd89b gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 7022739167248899053d619d19fac594884e12859ffc55e45ce2425027507823 run #0: crashed: KASAN: use-after-free Read in link_path_walk run #1: crashed: KASAN: use-after-free Read in link_path_walk run #2: crashed: KASAN: use-after-free Read in atime_needs_update run #3: crashed: KASAN: use-after-free Read in current_time run #4: crashed: KASAN: use-after-free Read in step_into run #5: crashed: KASAN: use-after-free Read in current_time run #6: crashed: KASAN: use-after-free Read in atime_needs_update run #7: crashed: KASAN: use-after-free Read in atime_needs_update run #8: crashed: KASAN: use-after-free Read in link_path_walk run #9: crashed: KASAN: use-after-free Read in atime_needs_update representative crash: KASAN: use-after-free Read in link_path_walk, types: [KASAN-USE-AFTER-FREE-READ] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [atomic_sleep hang memleak ubsan bug_or_warning locking], they are not needed testing commit c85054db46181ee85f10be997f41b347c85bd89b gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 failed building c85054db46181ee85f10be997f41b347c85bd89b: net/socket.c:1188:(.text+0x6d1a): undefined reference to `wext_handle_ioctl' net/socket.c:3389:(.text+0x7314): undefined reference to `compat_wext_handle_ioctl' net/core/net-procfs.c:343:(.text+0x33b): undefined reference to `wext_proc_exit' net/core/net-procfs.c:327:(.text+0x4e2): undefined reference to `wext_proc_init' minimized to 48 configs; suspects: [HID_ZEROPLUS USB_NET_CDC_SUBSET USB_NET_CDC_SUBSET_ENABLE USB_NET_DM9601 USB_NET_GL620A USB_NET_MCS7830 USB_NET_NET1080 USB_NET_PLUSB USB_NET_RNDIS_HOST USB_NET_SMSC75XX USB_NET_SMSC95XX USB_NET_SR9700 USB_NET_SR9800 USB_NET_ZAURUS USB_OHCI_HCD USB_OHCI_HCD_PCI USB_OHCI_HCD_PLATFORM USB_OTG USB_OTG_FSM USB_PRINTER USB_SERIAL USB_SERIAL_FTDI_SIO USB_SERIAL_GENERIC USB_SERIAL_PL2303 USB_STORAGE_ALAUDA USB_STORAGE_CYPRESS_ATACB USB_STORAGE_DATAFAB USB_STORAGE_FREECOM USB_STORAGE_ISD200 USB_STORAGE_JUMPSHOT USB_STORAGE_KARMA USB_STORAGE_ONETOUCH USB_STORAGE_SDDR09 USB_STORAGE_SDDR55 USB_STORAGE_USBAT USB_TRANCEVIBRATOR USB_U_AUDIO USB_U_ETHER USB_U_SERIAL USB_WDM USB_XHCI_PCI_RENESAS WLAN WLAN_VENDOR_ATH WLAN_VENDOR_ATMEL WLAN_VENDOR_BROADCOM WLAN_VENDOR_INTERSIL WLAN_VENDOR_MARVELL WLAN_VENDOR_MEDIATEK WLAN_VENDOR_MICROCHIP WLAN_VENDOR_RALINK WLAN_VENDOR_REALTEK WLAN_VENDOR_RSI WLAN_VENDOR_ZYDAS ZEROPLUS_FF] disabling configs for [bug_or_warning locking atomic_sleep hang memleak ubsan], they are not needed testing current HEAD 54850912d011fff547909dc2d0685c29c546c685 testing commit 54850912d011fff547909dc2d0685c29c546c685 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 1ba9a6bbe7cc39ed5ccbc1d2347db8937daa441c1677faab92a02c8aee6d48e5 run #0: crashed: KASAN: use-after-free Read in atime_needs_update run #1: crashed: KASAN: use-after-free Read in step_into run #2: crashed: KASAN: use-after-free Read in link_path_walk run #3: crashed: KASAN: use-after-free Read in step_into run #4: crashed: KASAN: use-after-free Read in step_into run #5: crashed: KASAN: use-after-free Read in link_path_walk run #6: crashed: KASAN: use-after-free Read in step_into run #7: crashed: KASAN: use-after-free Read in step_into run #8: crashed: KASAN: use-after-free Read in atime_needs_update run #9: crashed: KASAN: use-after-free Read in atime_needs_update representative crash: KASAN: use-after-free Read in atime_needs_update, types: [KASAN-USE-AFTER-FREE-READ] crash still not fixed/happens on the oldest tested release revisions tested: 7, total time: 2h16m38.183679493s (build: 38m2.178018714s, test: 1h26m27.052108006s) crash still not fixed or there were kernel test errors commit msg: Revert "virtio-mmio: fix device release warning on module unload" crash: KASAN: use-after-free Read in atime_needs_update ================================================================== BUG: KASAN: use-after-free in timespec64_compare include/linux/time64.h:56 [inline] BUG: KASAN: use-after-free in relatime_need_update fs/inode.c:1850 [inline] BUG: KASAN: use-after-free in atime_needs_update+0x5c4/0x600 fs/inode.c:1943 Read of size 8 at addr ffff88812af16638 by task syz.5.5167/15965 CPU: 1 PID: 15965 Comm: syz.5.5167 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x38/0x49 lib/dump_stack.c:106 print_address_description.constprop.0+0x24/0x160 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:427 [inline] kasan_report.cold+0x82/0xdb mm/kasan/report.c:444 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report_generic.c:309 timespec64_compare include/linux/time64.h:56 [inline] relatime_need_update fs/inode.c:1850 [inline] atime_needs_update+0x5c4/0x600 fs/inode.c:1943 pick_link fs/namei.c:1762 [inline] step_into+0xdb9/0x1e50 fs/namei.c:1840 walk_component+0x11a/0x690 fs/namei.c:1990 link_path_walk.part.0+0x57b/0xb30 fs/namei.c:2311 link_path_walk fs/namei.c:2236 [inline] path_parentat+0x8f/0x160 fs/namei.c:2510 __filename_parentat+0x19e/0x630 fs/namei.c:2534 filename_parentat fs/namei.c:2552 [inline] do_unlinkat+0xd7/0x5b0 fs/namei.c:4327 __do_sys_unlinkat fs/namei.c:4399 [inline] __se_sys_unlinkat fs/namei.c:4392 [inline] __x64_sys_unlinkat+0x95/0xe0 fs/namei.c:4392 x64_sys_call+0x2c1/0x990 arch/x86/include/generated/asm/syscalls_64.h:264 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x33/0x80 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7fe5675bfe59 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fe567422028 EFLAGS: 00000246 ORIG_RAX: 0000000000000107 RAX: ffffffffffffffda RBX: 00007fe567838fa0 RCX: 00007fe5675bfe59 RDX: 0000000000000000 RSI: 00002000000001c0 RDI: 0000000000000004 RBP: 00007fe567655e6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fe567839038 R14: 00007fe567838fa0 R15: 00007fffa90d4ad8 Allocated by task 15965: kasan_save_stack+0x26/0x50 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:433 [inline] __kasan_slab_alloc+0x94/0xc0 mm/kasan/common.c:466 kasan_slab_alloc include/linux/kasan.h:217 [inline] slab_post_alloc_hook mm/slab.h:550 [inline] slab_alloc_node mm/slub.c:3245 [inline] slab_alloc mm/slub.c:3255 [inline] kmem_cache_alloc+0x136/0x4d0 mm/slub.c:3260 alloc_inode+0x126/0x1e0 fs/inode.c:266 new_inode_pseudo fs/inode.c:1011 [inline] new_inode+0x1d/0x2f0 fs/inode.c:1040 bpf_get_inode+0x46/0x180 kernel/bpf/inode.c:116 bpf_symlink+0x5c/0x1a0 kernel/bpf/inode.c:394 vfs_symlink fs/namei.c:4437 [inline] vfs_symlink+0xe9/0x2b0 fs/namei.c:4422 do_symlinkat+0x134/0x2a0 fs/namei.c:4466 __do_sys_symlinkat fs/namei.c:4483 [inline] __se_sys_symlinkat fs/namei.c:4480 [inline] __x64_sys_symlinkat+0x94/0xc0 fs/namei.c:4480 x64_sys_call+0x2ac/0x990 arch/x86/include/generated/asm/syscalls_64.h:267 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x33/0x80 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 Freed by task 15970: kasan_save_stack+0x26/0x50 mm/kasan/common.c:38 kasan_set_track+0x25/0x30 mm/kasan/common.c:45 kasan_set_free_info+0x24/0x40 mm/kasan/generic.c:370 ____kasan_slab_free mm/kasan/common.c:365 [inline] ____kasan_slab_free mm/kasan/common.c:327 [inline] __kasan_slab_free+0x111/0x150 mm/kasan/common.c:373 kasan_slab_free include/linux/kasan.h:193 [inline] slab_free_hook mm/slub.c:1728 [inline] slab_free_freelist_hook+0x94/0x1a0 mm/slub.c:1754 slab_free mm/slub.c:3526 [inline] kmem_cache_free+0x105/0x2a0 mm/slub.c:3544 free_inode_nonrcu+0x13/0x20 fs/inode.c:245 bpf_destroy_inode+0xb6/0x1a0 kernel/bpf/inode.c:621 destroy_inode+0xbd/0x190 fs/inode.c:314 evict+0x50d/0x8b0 fs/inode.c:665 iput_final fs/inode.c:1779 [inline] iput.part.0+0x334/0x640 fs/inode.c:1805 iput+0x3f/0x50 fs/inode.c:1795 do_unlinkat+0x354/0x5b0 fs/namei.c:4363 __do_sys_unlinkat fs/namei.c:4399 [inline] __se_sys_unlinkat fs/namei.c:4392 [inline] __x64_sys_unlinkat+0x95/0xe0 fs/namei.c:4392 x64_sys_call+0x2c1/0x990 arch/x86/include/generated/asm/syscalls_64.h:264 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x33/0x80 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 The buggy address belongs to the object at ffff88812af165d0 which belongs to the cache inode_cache of size 752 The buggy address is located 104 bytes inside of 752-byte region [ffff88812af165d0, ffff88812af168c0) The buggy address belongs to the page: page:ffffea0004abc500 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x12af14 head:ffffea0004abc500 order:2 compound_mapcount:0 compound_pincount:0 flags: 0x4000000000010200(slab|head|zone=1) raw: 4000000000010200 dead000000000100 dead000000000122 ffff88810019b500 raw: 0000000000000000 0000000080120012 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 2, migratetype Reclaimable, gfp_mask 0x1d20d0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 579, ts 41361655524, free_ts 0 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook mm/page_alloc.c:2607 [inline] prep_new_page+0x1a2/0x310 mm/page_alloc.c:2613 get_page_from_freelist+0x1ce2/0x30a0 mm/page_alloc.c:4487 __alloc_pages+0x300/0x2d60 mm/page_alloc.c:5824 __alloc_pages_node include/linux/gfp.h:595 [inline] alloc_pages_node include/linux/gfp.h:609 [inline] alloc_pages include/linux/gfp.h:622 [inline] alloc_slab_page mm/slub.c:1798 [inline] allocate_slab+0x39d/0x530 mm/slub.c:1937 new_slab mm/slub.c:2000 [inline] ___slab_alloc.constprop.0+0x3ca/0x890 mm/slub.c:3033 __slab_alloc.constprop.0+0x42/0x80 mm/slub.c:3120 slab_alloc_node mm/slub.c:3211 [inline] slab_alloc mm/slub.c:3255 [inline] kmem_cache_alloc+0x48d/0x4d0 mm/slub.c:3260 alloc_inode+0x126/0x1e0 fs/inode.c:266 new_inode_pseudo fs/inode.c:1011 [inline] new_inode+0x1d/0x2f0 fs/inode.c:1040 simple_fill_super+0xf3/0x630 fs/libfs.c:630 bpf_fill_super+0xbc/0x7e0 kernel/bpf/inode.c:769 vfs_get_super fs/super.c:1172 [inline] get_tree_nodev+0x9f/0x1a0 fs/super.c:1202 bpf_get_tree+0x10/0x20 kernel/bpf/inode.c:785 vfs_get_tree+0x81/0x1b0 fs/super.c:1530 vfs_fsconfig_locked fs/fsopen.c:238 [inline] __do_sys_fsconfig+0x75b/0x9f0 fs/fsopen.c:445 __se_sys_fsconfig fs/fsopen.c:320 [inline] __x64_sys_fsconfig+0xb9/0x140 fs/fsopen.c:320 page_owner free stack trace missing Memory state around the buggy address: ffff88812af16500: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc ffff88812af16580: fc fc fc fc fc fc fc fc fc fc fa fb fb fb fb fb >ffff88812af16600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88812af16680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88812af16700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================